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9 November, 14:57

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

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  1. 9 November, 15:15
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    We have the following values used to solve this:

    For ⁴₂He:

    No of protons: 2

    No of neutrons : 2

    Mass of proton: 1.00728 amu

    Mass of neutron: 1.00867 amu

    Atomic mass: 4.002603 amu

    The formula to solve for the mass defect is:

    md = (mp + mn) - mo

    md = (2x 1.00728 + 2x1.00867) - 4.002603

    md = 0.029297

    Therefore, the mass defect is 0.029297 amu
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